tolong jawab mau dikumpul besok

a) 04.30
(30x2) - 30/60 x 30
= 60 - 15 = 45
b) 07.20
(30x3) + 20/60 x 30
= 90 + 10 = 100
c) 09.01
(30x3) + 1/60 x 30
=90 + 1/2 = 90,5
d) 10.40
(30x2) + 40/60 x 30
= 60 + 120/6 = 60+20=80
05.12
(30x3) - 12/60 x 30
= 90 - 6 = 84